Override methods extends over screen

[honeywrangler]

Hi, I have tried the discussions at nvim-jdtls, since I assume my issue stems from that plugin, but since I have not yet gotten an answer over there:

In the picture below, you may see that after doing a code action to override a method, jdtls successfully shows me the available methods.

Here's my problem: The window seems to cut off, extending beyond the border of my terminal. It does not list all methods and visibly does not have the same kind of round corners at the bottom as at the top. I see a scroll bar at the right side, indicating to me I can scroll to see the methods further down. Tried vim movements, arrow keys and my scroll wheel. Nothing worked.

As I haven't found anything online I would appreciate it if someone could help me out. Though pardon me if I missed another discussion.